Question

142

Change key in js associative array

rated 0 times [ 148] [ 6] / answers: 1 / hits: 45901 / 13 Years ago, thu, july 28, 2011, 12:00:00

If I have:

var myArray = new Array();



myArray['hello'] = value;

How can I change the key 'hello' to something else?

Something like this would work.

var from = 'hello',

    to   = 'world',

    i, value = myArray[from];



for( i in myArray )

  if( i == from ) myArray.splice( i, 1 );



myArray[to] = value;

But is there a native function or a better way to do it?

edit:

Due to the lack of associative arrays in js, what I want to do modify the property name of an object as efficiently as possible.

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tammyb

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1 Year ago

answered 13 Years ago stacie · Accepted Answer

In JavaScript there is no such thing as associative Array. Objects can be used instead:

var myHash = new Object();

or

var myHash = {};

replace can be done like this:

myHash[from] = value;

myHash[to] = myHash[from];

delete myHash[from];

but the preferred way to write it:

myHash.from = value;

myHash.to = myHash.from;

delete myHash.from;